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). 
8. Require a metalearning essay. On the day you collect the papers, have students write an in-class essay about what they learned from the assignment. What problems did they face and how did they overcome them? What research strategy did they follow? Where did they locate most of their sources? What is the most important thing they learned from investigating this subject? For most students, who actually did the research paper, this assignment will help them think about their own learning. It also provides you with information about the students' knowledge of their papers and it gives you a writing sample to compare with the papers. If a student's knowledge of the paper and its process seems modest or if the in-class essay quality diverges strikingly from the writing ability shown in the paper, further investigation is probably warranted.
Plagiarism awareness sites
Plagiarism definition and statements on plagiarism
• Center for Excellence in Teaching and Learning (CETL) at the University of Albany. CETL’s Web site provides tips to educate students and teachers about plagiarism, definitions, and strategies for avoiding plagiarism. It also has software available to detect plagiarism and provides a list of paper dealers. Access: http:///cetl/teaching/ .
• Helping Students Avoid Plagiarism. This site, which links to the University of Maryland’s College’s Effective Writing Program, has tips and general guidelines to resources. Access:
• Plagiarism: Definitions, Examples and Penalties. Designed for a chemistry class at the University of Kentucky, this site provides definitions and examples of plagiarism with subsequent penalties for committing the offense, but the information can be applied to any subject area. The information is still relevant, but the site has not been updated since December 1998. Access:
• Plagiarism: What it is and How to Recognize and Avoid it. The information for this site is taken from the “Student Code of Rights, Responsibilities, and Conduct” handbook at Indiana University-Bloomington. It provides students with information and strategies for avoiding plagiarism with examples of proper paraphrasing. Access: http:///~wts/wts/ .
• Purdue Online Writing Lab. This site presents information on avoiding plagiarism and shows circumstances when documentation is necessary. It also provides a plagiarism exercise for students and shows a graph of deliberate plagiarism and possible accidental plagiarism. Access: http:///handouts/research/r_ .
• Talking about Plagiarism. A site that provides a description of suitable language, which faculty can include in their syllabus to make students understand what plagiarism is and emphasize good writing skills. It also gives teachers permission to use any of the content to create their own syllabi. Access: http:///technotes/workshops/ .