title: Letter in reply to 'Evidence pyramids' from Dr Kaufmann.
authors: Department of DynaMed, EBSCO Health, Ipswich, Massachusetts, USA.
authors: Brian S
authors: 0000-0003-4300-4928
authors: BS
authors: Alper
authors: McMaster University, Hamilton, Ontario, Canada.
authors: Brian R
authors: BR
authors: Haynes
keywords: MEDICAL EDUCATION & TRAINING