Response to letter by Forike et al.: more rigorous, not less, external validation is needed

Affiliations

• ¹ Department of Cardiology, Bern University Hospital, Bern, Switzerland.
• ² Stanford Prevention Research Center, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Health Research and Policy, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Statistics, Stanford University School of Humanities and Sciences, 1265 Welch Rd., Stanford, CA 94305, USA. Electronic address: jioannid@stanford.edu.