Sarnia doctor to help reduce opioid prescriptions in Erie St. Clair LHIN Facebook Twitter Reddit LinkedIn LHIN covering Windsor-Essex, Sarnia-Lambton and Chatham-Kent has highest opioid prescription rate in Ontario Jonathan Pinto · CBC News Dr. Blake Pearson is leading the Erie St. Clair LHIN’s addictions and opioid strategy. (Meredith Deuber)