“…shelving jobs, porterage, hod-carrying, hammering, swimming, wrestling, volleyball or handball, tennis or squash, baseball, and bodybuilding (2,4,8,10). In an uncontrolled retrospective analysis of a series of 27 patients with primary subclavian venous thrombosis, Zell et al (8) reported that 24 had exerted unusual physical strain for several days or weeks and apparently fulfilled the criteria for occupational disease.…”