MENS are applied through placement of six electrodes (size of 4x4cm), of which four were placed exactly like the TENS electrodes and the other two, one in the palm and the other at the height of the asteroid ganglion. Duration of the intervention was 24 min for a total of 15 sessions. The frequency was 50 Hz and the intensity was 100 μA.

TENS are applied through the placement of four electrodes on either side of the deltoid muscle, on the front and back surfaces of the shoulder joint for 20 min and each patient received 15 sessions (five per week). A constant current of high frequency was used (100 HZ) and its intensity was initiated at 10mA and was then gradually increased to 15mA

Numeric Rating Scale, ranging from 0-10 (with 0 = no pain, and 10=worst pain). It measures pain intensity

SPADI questionnaire (shoulder pain and disability questionnaire). It measures pain and disability caused by shoulder diseases, each question ranging between 0 and 10 (with 0 indicating no disability and 10 indicating worst disability). It includes 5 questions about pain and 8 questions about disability.

EQ 5D, EuroQol measuring of perceived Health today, Scale 0-100 (with 0 indicating worst health, and 100 indicating best imaginable health as perceived by the patient)