found: Hoppenfeld, S. The anatomical basis of orthopaedic surgery, 1984 (a.e.)t.p. (Piet deBoer, M.D., Sen. Reg., St. Thomas Hosp., London)
found: AO principles of teaching and learning, c2005:t.p. (Piet G. de Boer) p. v (Piet G. de Boer, FRCS, AO International; UK-York)
found: Surgical exposures in orthopaedics, 2017:t.p. (Piet de Boer) p. facing t.p. (M.A., F.R.C.S.; visiting lecturer, Univ. of Rijeka Medical Sch., Department of Anatomy, Croatia; CEO, Medical Education consultants GmBH, Zurich, Switzerland) p. vii (De Boer PG)
found: Email from publisher, Aug. 2, 2016(author's preference for surname is De Boer)