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Dr. Chang, Chief Scientific Advisor of Nu Skin Enterprises, has over 20 years of pharmaceutical experience. He is an expert at drug development and has vast managerial experience as the CEO & President of Optima Pharmaceuticals, Vice President of Research and Development for Pharmanex, the Director of Medical Chemistry at Rhone-Poulenc Rorer and Deputy Director of Medicinal Chemistry at Merck. He had directed several drug discovery projects and IND submissions. His research has resulted in more than 60 articles published in peer-review journals and 35 patents. | 