“…It is probable that some of these cases were not severe, and that there is some duplication in different publications, but the general picture of a not uncommon disease remains valid. Many of the clinical reports are of fairly large series collected over periods of a few years, for example, those of Will (1958) 10 cases, Bonilla (1961) 11 cases, KeCske's et al (1963) 12 cases, Sadowski andPrzeidziecki (1963) 12 cases, Pachomov andCaughey (1958) 13 cases, Querido et al (1954) 14 cases, Hughes andSummers (1956) 14 cases, Kovadid andMikuliCid (1961) 14 cases, da Fonseca andSchermann (1962) 14 cases, Van Arsdel and Williams (1956) 15 cases, Teter et al (1961) 17 cases, Purnell et al (1964) I8 cases, Lichtinger (1957) 23 cases, Kind (1958) 25 cases, Bernart and de Andino (1958) 34 cases, Chi-shou et al (1963) 35 cases, and Murdoch (1962a) 57 cases. Murdoch's cases were observed in a 10-year period in Glasgow which has a population of about one million.…”