Disclosure: Clara C. Chan is not on any Advisory Boards and has not consulted for any companies in the last 12 months. She has received travel and honorarium for speaking at meetings supported by Allergan in the last 12 months. She has no stocks, equity, and contract of employment or named position within any for-profit company. Edward J. Holland is on the Advisory Boards for Alcon Laboratories and has consulted to Abbott Medical Optics, Advanced Vision Research Inc., Alcon Laboratories, Allergan, Bausch & Lomb, Inspire Pharmaceuticals, Ocusoft, QLT Phototherapeutics Inc., Senju Pharmaceutical Co. Ltd., and Wavetec Vision Systems Inc. in the last 12 months. He has received travel and honorarium for speaking at meetings supported by Allergan, Bausch & Lomb and Alcon Laboratories Inc. as well in the last 12 months. He has no stocks, equity, and contract of employment or named position within any for-profit company.
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Chan et al. (2012) studied this question.
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