“…The only organ-specific outcome measure that was developed for mucocutaneous BS and validated was the oral ulcer composite index 126 . The frequency, duration, size, pain, severity, and healing time of each of the mucocutaneous lesions were used as outcomes in different combinations in several studies 57,118,120,127-135,138-140,185,243-251 . Similarly, the number, frequency, severity, duration, and pain of arthritis episodes were reported in several studies 132,133,137,139,141,142,143 .…”