The second approach to the management of leucoderma focuses on repigmentation therapies. Common therapies are of three types: The topical application of potent corticosteroids, (PUVA) psoralen photochemotherapy and surgical therapies. Of these interventions PUVA is considered the most effective treatment available in the United States, however the treatments are time-consuming, side effects can be severe, 4 and complete repigmentation only occurs in 15-20%. 5 Interestingly, psoralens used with photochemotherapy are obtained from the ancient Ayurvedic herb known as Vakuchi (psoralea corylifolia). 
PhD and Master’s students often ask us to supply them with specific performance and/or score data; sometimes we are able to do this, but on many occasions it is not possible for the reasons explained above. However, as ‘researchers in training’, there is great value in you planning and managing your own data collection activity; it means you can construct a balanced sample with known characteristics, and you can also gather valuable additional background information on the subjects in your study, via questionnaires, focus groups or verbal protocol analysis.