For thousands of Oregonians, the path to a medical marijuana card starts at a clinic in Southeast Portland staffed by Dr. Thomas Orvald, an 80-year-old retired heart surgeon from Yakima. In the past year, Orvald has signed off on 4,180 cards.

Read more at: http://www.oregonlive.com/health/index.ssf/2012/12/medical_marijuana_a_few_high-v.html