By Lydia NuzumStaff writerA Martinsburg doctor accused of illegal drug activity had her license revoked by West Virginia Board of Medicine earlier this week. Dr. Tressie Montene Duffy, who operated West Virginia Weight and Wellness Inc. in Martinsburg, was convicted on federal drug distribution charges in December, pleading guilty to seven counts of aiding and abetting the distribution of oxycodone, a highly addictive Schedule II drug used to treat pain.Duffy signed blank prescription orders and allowed unlicensed members of her staff to issue prescriptions for narcotics to patients despite the fact that they weren't seen by a physician, U.S.