In this study , @ children from @ months to @ years of age , eligible for Diphtheria , Tetanus toxoids and whole-cell Pertussis immunization and who referred to @ health centers , were randomized into @ groups of regular syringe users ( the Auto-Disable syringe with a @ gauge and @ mm needle ) and new syringe users ( the disposable syringe with a @ gauge and @ mm needle ) .