1. Worldwide Health Economics and Outcomes Research Unit, Bristol Myers Squibb, Princeton, New Jersey, USA;
2. Offshore Delivery, Mu Sigma, Bengaluru, India;
3. Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina, USA;
4. Center for Esophageal Diseases and Swallowing, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA.