1. Department of Population Health, New York University Grossman School of Medicine, New York, NY, USA
2. Dipartimento di Chimica, Università di Torino, Torino, Italy
3. Centro Regionale Antidoping e di Tossicologia, Orbassano, Italy
4. Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, USA