I know Dr. David Zwillenberg for 40 yrs. he was all of my 4 children’s ENT DR. Seen him at Jefferson Hospital. He is very detailed, ask questions, doesn’t rush he, compassionate,about you. He explains EVERYTHING to you. He saved my youngest son. He had ear infections from about a month after he was born, & had Chronic OtIs. For the 1st 6 months of his life it started once a month then every week to every 2 weeks. The Dr. put tubes i . It was SO much BETTER. Only one ear infection after the tubes By the time my son was 8 to a year old he developed a perforated ear infection & they need to take out a bone behind his ear. I was told he may get brain damage. Dr. D. Zwillenberg didn’t know until he did the surgery. He took out the bone it fell apart on the table did his Adonose. He was all better after the surgery. But, however I didn’t tell you the whole story my sone went through a lot of pain. If it wasn’t for Dr. David Zwillenberg my son would not be hear with me.