Author: David W.Tschanz
- David holds advanced degrees in history and epidemiology and has worked for Saudi Aramco in Dhahran since 1989. He writes primarily about history, medicine and technology. The second edition of his book Petra: A Brief History will be published in March.(dwt1121@gmail.com)
Posts by David W.Tschanz
Pioneer Physicians
With their legacies of life saving innovations, among the many who helped swing open the door to modern medicine were five whose contributions still resonate.











