I.M.Rogers is a retired surgeon with a long-standing interest in the cause. He made the earliest discovery of neonatal hypergastrinaemia and also was ,as far as I know, to document hyperacidity in the pyloric stenosis(PS) baby. He first proposed an inherited primary hyperacidity as the cause and subsequently refined this theory in the light of evidence showing insensitivity of the negative feed-back between acid and gastrin in the early weeks. He is the author of The Consequences and Cause of PS of Infancy with a survivor of PS-Dr. Fred. Vanderbom available on AMAZON ISBN 978-3-659-52125—6 and has just finished another book Pyloric stenosis of Infancy-the Great Mystery unravels- again published by Amazon all profits to the Safe Water Trust.Available 2019. He is also the author of many paers on the subject of cause.