The Primary Aim of this study is to validate a questionnaire as a screening tool to identify subjects with symptoms suggestive of nephrogenic systemic fibrosis (NSF). The investigators believe that there will be difference between subjects with NSF and other skin conditions and normal skin.

Inclusion Criteria:

1. Male or female subjects 18 years of age or older.
2. Willing and able to understand and provide oral informed consent.
3. Able to complete study and comply with study procedures.

Exclusion Criteria:

1. Subject is unable to provide oral consent.
2. Psychiatric or other conditions which might, in the opinion of the Principal Investigator, interfere with study evaluations or pose a risk to subject safety during the study.

Massachusetts General Hospital Dermatology and Rheumatology clinics