The investigator assigned PGA grades according to a 5-point scale (clear [not detectable], almost clear [less than 10% of affected hand surface], mild disease [less than 10% of affected hand surface], moderate disease [10% to 30% of affected hand surface], severe disease [>30% of affected hand surface]). PGA ratings were based on an integrated clinical picture of signs, symptoms, and the extent of disease. Symptoms included erythema, scaling, hyperkeratosis/lichenification, vesiculation, edema, fissures, and pruritus/pain. The PGA scale ranges from 0 (no symptom) to 4 (severe disease). Participants were considered as responders when they had a PGA of clear or almost clear.

ITT Population.

A 4-point scale (0=none, 1=mild, 2=moderate, 3=severe) was used to grade 7 signs or symptoms of CHE. The mTLSS was calculated as sum of assigned scores for the symptoms of erythema, scaling, lichenification/hyperkeratosis, vesiculation, edema, fissures and Pruritus/Pain. The total score ranged from 0 (best) to 21 (worst). Baseline was defined at Week 0. Change from Baseline was calculated by subtracting the Baseline value from the individual post-baseline values. Percentage change from Baseline = (change from Baseline / Baseline value) * 100. Data for Week 24 last observation carried forward (LOCF) has been presented.

ITT population.

At Week 24 or at the end-of-treatment participants were asked by the investigator to grade their overall change from Baseline by selecting one of the following descriptions, which best matched their perception of overall treatment effect: cleared or almost cleared (at least 90% clearing), marked improvement (at least 75% clearing), moderate improvement (at least 50% clearing), mild improvement (at least 25% clearing), no change and worsening. Participants were considered as responders when the PaGa was cleared or almost cleared.

ITT Population.

The extent of disease was estimated as the percentage of hand area (with 100% defined as the palmar and dorsal aspects) affected by eczema at Baseline, and at the end of treatment). Extent of disease was estimated separately for the left and right hands, and the overall extent of disease for both hands was calculated as (Left+Right)/2. Baseline was defined at Week 0. Change from Baseline was calculated by subtracting the Baseline value from the individual post-baseline values. Percentage change from Baseline = (change from Baseline / Baseline value) * 100.

ITT Population. Only those participants available at the indicated time points were analyzed.

Response Duration was defined as time from the end-of-therapy to the first diagnosis of mild, moderate, or severe CHE. Median and inter-quartile range has been presented.

ITT population.

Time to relapse was defined as the time from end-of-therapy to the first diagnosis of severe CHE. Median and inter-quartile range has been presented. The median was based on the very last participant having a follow-up period longer than expected, those explaining the high median.

ITT population.

Time to response was defined as time from start of treatment to first PGA assessment of "clear" or "almost clear". Median and inter-quartile range has been presented.

ITT population. Only those participant who responded to PGA assessment at the end of therapy was analyzed.

An AE was defined as any adverse change from the participant's Baseline (pretreatment) clinical condition, including intercurrent illness, which occurred during the course of the clinical study after written informed consent had been given, whether considered related to treatment or not. A treatment-emergent AE was defined as any adverse change that occurred after treatment started and up to 7 days after last treatment. An SAE was any experience that suggested a significant hazard, contradiction, side effect or precaution. It was any adverse event that at any dose resulted in death, was life-threatening, required in-patient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity or was a congenital anomaly/birth defect.

Safety Population included all randomized participants who received at least one dose of study medication.

Blood samples were collected for the assessment of laboratory parameters hemoglobin, hematocrit, erythrocytes, mean corpuscular volume, mean corpuscular hemoglobin concentration, reticulocytes, platelets, white blood cell, lymphocytes, neutrophils, monocytes, eosinophils, basophils, total bilirubin, bilirubin conjugated (direct), aspartate amino transferase (AST), alanine amino transferase (ALT), lactate dehydrogenase (LDH), creatine phosphokinase (CPK), alkaline phosphatase (ALP), total protein, serum albumin, glucose, triglycerides, total cholesterol, high-density lipoprotein (HDL) cholesterol, low density lipoprotein (LDL) cholesterol, sodium, potassium, chloride, serum calcium, serum phosphate, serum creatinine, blood urea nitrogen (BUN)/urea, uric acid, Free thyroxin and thyroid stimulating hormone (TSH) at Baseline and every 4 weeks of treatment period and Week 28 of follow up period. Data for participants with values outside the marked reference range are reported.

Safety Population. Only those participants available at the indicated time points were analyzed.

The BSI is a 53 item self-report scale used to measure nine primary symptom dimensions (somatization, obsessive-compulsive behavior, interpersonal sensitivity, depression, anxiety, hostility, phobic anxiety, paranoid ideation, and psychoticism). Respondents rank each feeling item (e.g., "your feelings being easily hurt") on a 5-point scale where, 0=not at all, 1=a little bit, 2=moderately, 3=quite a bit, 4=extremely (0 indicates best outcome and 4 indicates worst outcome). The total score ranged from 0 (best outcome) to 212 (worse outcome). Participants with an increase above Baseline of 25% or more on any domain subscore in BSI-53, or with an increase above Baseline of >=2 points or a score >=3 on any BSI-53 item that reflects depression, suicidality, psychotic symptoms, and hostility/aggression, were to be referred to a psychiatrist within 2 weeks.

Safety population. Only those participants meeting the criteria of referring to psychiatrist were analyzed.

The PHQ-9 was a standardized tests of mood/depression. This was a nine item measure with a response for each item between 0-3 where, 0=not at all, 1= several days, 2= more than half the days, 3= nearly every day. Total scores on this measure range from 0-27, with 0 being a minimum indicating no depressive symptoms, and 27 being the maximum number and severity of depressive symptoms. Baseline was defined at Week 0. Change from Baseline was calculated by subtracting the Baseline value from the individual post-baseline values.

Safety population. Only those participants available at the indicated time points were analyzed.

Participants meeting any of the following criteria were to be referred for specialist psychiatric evaluation within 2 weeks: PHQ-9 Score >=15, Two Subsequent Scores of >=10 and PHQ-9 Question 9 >=1. The PHQ -9 was a standardized tests of mood/depression. This was a nine item measure with a response for each item between 0-3 where, 0=not at all, 1= several days, 2= more than half the days, 3= nearly everyday. Total scores on this measure range from 0-27, with 0 being a minimum indicating no depressive symptoms, and 27 being the maximum number and severity of depressive symptoms. Only categories with data available at the indicated time points have been presented. Categories with null values for all the arms have not been presented.

Safety Population. Only those participants available at the indicated time points were analyzed.

HHIE-S assessed participants by handicap category: no handicap (0 to 8 points); mild/moderate handicap (10 to 24 points); severe handicap (26-40 points). Baseline was defined at Week 0. Change from Baseline was calculated by subtracting the Baseline value from the individual post-baseline values.

Safety Population. Only those participants available at the indicated time points were analyzed.

DHI assessed participants by handicap category: no handicap (0 to 14 points); mild handicap (16 to 34 points); moderate handicap (36 to 52 points); severe handicap (54 points). Increase from Baseline of <6 points, 6 to <12 points and 12 points. Baseline was defined at Week 0. Change from Baseline was calculated by subtracting the Baseline value from the individual post-baseline values.

Safety Population. Only those participants available at the indicated time points were analyzed.

Participants who developed tinnitus were monitored by use of the TOMI. The numbers of participants with pre-existing tinnitus, new tinnitus, increased/decreased loudness of tinnitus, or increased/decreased duration of tinnitus, pulsing quality of tinnitus were assessed.

Safety Population. Only those participants available at the indicated time points were analyzed.

Bone mineral density scans of the left proximal femur (total hip) and anterior-posterior lumbar spine were obtained by use of DXA, at Baseline, at end of therapy, and 1 year (48 weeks) after end of therapy. In case of abnormality or surgery of the left hip, the right hip was to be used. If both hips were affected, the participant was not eligible for DXA. Vertebrae L1 to L4 had to be completely scanned. At least 3 vertebrae had to be free of any abnormalities potentially interfering with DXA analysis (eg, fractures, large osteophytes), otherwise the participant was not eligible for DXA. Baseline was defined at Week 0. Change from Baseline was calculated by subtracting the Baseline value from the individual post-baseline values. Percentage change from Baseline = (change from Baseline / Baseline value) * 100. Least square means and 95% confidence interval has been presented.

Safety Population. Only those participants available at the indicated time points were analyzed.

X-ray evaluations was done at Baseline (Week 0), end of therapy and at follow up period (Week 72). X-ray evaluations was done for Lateral C-Spine, Lateral T-Spine and Calcaneous. The images were evaluated as optimal, readable (but not optimal) or not readable.

Safety Population. Only those participants who had X-ray evaluations were analyzed.

An adverse change was defined as a change from normal at Baseline to abnormal at end of therapy, or as a worsening from Baseline for either or both eyes. A missing adverse change was defined as missing results at Baseline and end of therapy, or missing result at Baseline and abnormal at end of therapy, or normal at Baseline and missing result at end of therapy, or abnormal at Baseline and missing result at end of therapy, for both eyes or one eye when the other eye was not concerned by an adverse change. Other changes from Baseline to end of therapy was considered as no adverse change. Optic disc, macula, and retinal periphery were assessed by fundoscopy after pupil dilation using tropicamide.

Safety Population. Only those participants who had ophthalmological evaluations were analyzed.

An adverse change was defined as a change from normal at Baseline to abnormal at end of therapy. A missing adverse change was defined as missing results at Baseline and end of therapy, or missing result at Baseline and abnormal at end of therapy, or normal at Baseline and missing result at end of therapy. Other changes from Baseline to end of therapy are considered as no adverse change. All puretone testing used a modified Hughson-Westlake procedure with 5 decibel (dB) step size.

Safety Population. Only those participants who had audiologic evaluations were analyzed.