Dear Editor, I truly appreciated Olivia Gieger’s recent article in VTDigger on the question of who pays for training Vermont’s doctors. It is a much-needed glimpse into a critical and sorely undercovered subject. The memo — a Green Mountain Care Board filing on what it costs the University of Vermont Medical Center to train doctors — answers how much. It never asks how much per doctor, and these figures give it. Vermont spends $161 million per y…