Letter: Immunization: a survey in general practice.
D001315:Australia; D004165:Diphtheria / Q000517:prevention & control*; D005194:Family Practice; D006801:Humans; D007114:Immunization; D007223:Infant; D013742:Tetanus / Q000517:prevention & control*; D014917:Whooping Cough / Q000517:prevention & control*