If the parent/caretaker consents to include the child in the study, a unique patient identification number will be assigned to the child and a wrist band with the identification number will be given. Administrative data will be recorded (name of child and parent/caretaker, gender, age, address and directions) on a Case Record Form (Appendix 5.5). An appointment schedule will be clearly explained and a follow-up card marked with the unique patient identification number will be handed out.