Nancy Collup, M.D.Nancy Collup, M.D., is a professor and Director of the Emory Sleep Center, Emory University School of Medicine. She has served as a board member and president for the American Academy of Sleep Medicine. Latest Articles by Nancy Collup, M.D.Sleep DisordersCPAP Mask Tips for People With Sleep ApneaAlthough your CPAP mask may take some getting used to, it’s worth making the effort to use it consistently.