Clarke R.C. and D.W. Pate, 1994. Medical marijuana. JIHA 1: 9-12. The labeling letters for CBD and CBC were inadvertently reversed on Fig. 1, page 10. Therefore, the caption should read: Figure 1. Some cannabinoids, a) THC, delta-9-tetrahydrocannabi-nol; b) CBD, cannabidiol; c) CBC, cannabichromene; d) CBG, cannabigerol.