“…Besterman, Myat, and Travadi (1967) have recently confirmed the difference in platelet stickiness between patients and controls (significant at the 0 01 level in their experience), and have shown an interesting and significant diurnal variation in platelet stickiness, with an increase towards the end of the day. Further, they studied the possibility, with experimental evidence, of a link in platelet behaviour and catecholamine excretion.…”