Dr Van Schalkwyk, Pieter, is a healthcare practitioner, specialising as a General Practitioner, GP, in Middelburg, Middelburg - MP, Mpumalanga ...Dr Van Schalkwyk, Pieter, is a healthcare practitioner, specialising as a General Practitioner, GP, in Middelburg, Middelburg - MP, Mpumalanga, South Africa.