Corrections

The News article “New dosage limits for medical marijuana: But where's the science?”1 contained an error in a cited study (IDrugs 2004;7:464-70). The study authors recommend a dose range of 0.05–7.40 g per day, depending on the level of tetrahydrocannabinol in the marijuana, which varied from 5%–30%. CMAJ apologizes for any inconvenience this error may have caused.