Caffeine

• HealthTech Connex Centre for Neurology Studies — Surrey, British Columbia, Canada

• Ain Shams University Hospitals — Cairo, Egypt

• National Taiwan University of Sport — Taichung, Taiwan

• Translational GeroScience Laboratory — Oklahoma City, Oklahoma, United States

• UPK Basel — Basel, Canton of Basel-City, Switzerland

• Bern University Hospital, Inselspital — Bern, Switzerland

• University of Arizona — Tucson, Arizona, United States

• Institut de recherche biomedical des armées — Brétigny-sur-Orge, France
• Hotel Dieu — Paris, France

Not specified

• University of Zurich — Zurich, Switzerland