Bök, Jan A. Correspondence on genetics, schizophrenia, hand, finger and footprints and chromosomal abnormality in Down's syndrome. Includes patient case notes with enclosed images of hand- and footprints, karyograms, offprints of articles and a poster advertising the lecture by Bök on "Some Mechanisms of Chromosome Variations and their Relation to Human Malformations" on 20 May 1964. Jul 1953