The cost and benefit of prophylaxis against deep-vein thrombosis in elective hip replacement. - Abdool-Carrim,T.; Adler,H.; Becker,P.; Carides,M.; Ginsberg,J.; Golele,R.; Gobler,G.; Immelman,E.; Lukhele,M.; Veller,M.; Watt,K.; Weber,F.; et al. (SAMJ, 1997)