THIS STUDY WILL EVALUATE THE IMMUNOGENICITY, REACTOGENICITY AND SAFETY OF THE ROUTINE INFANT VACCINES PEDIARIX®, HIBERIX® AND PREVENAR 13® WHEN CO-ADMINISTERED WITH GLAXOSMITHKLINE (GSK) BIOLOGICALS' LIQUID HUMAN ROTAVIRUS VACCINE (HRV) AS COMPARED TO GSK'S LICENSED LYOPHILIZED VACCINE: