SUBANG, 25 Sep 19 - The Royal Sultan of Perak Darul Ridzuan, Sultan Nazrin Muizzuddin Shah ibni Almarhum Sultan Azlan Muhibbuddin Shah Al-Maghfur-Lah, Colonel-in-Chief of the Royal Health Corps visited the Aviation Medical Institute (IPP) at Subang Air Base. His arrival was welcomed by the Chief of Army,