Vyas, K C1987-11-012009-05-301987-11-012009-05-301987-11-01Vyas KC. Tetanus and blood group relationship. Journal of the Association of Physicians of India. 1987 Nov; 35(11): 803http://imsear.searo.who.int/handle/123456789/87243engBlood Group AntigensHumansTetanus --bloodLetter