TY - GEN AU - Sleigh,J W TI - Confound those damned confounders SN - 0310-057X PY - 2012///0906 KW - Anesthesia Recovery Period KW - Anesthetics KW - administration & dosage KW - Female KW - Hair Color KW - Humans KW - Male KW - Receptor, Melanocortin, Type 1 KW - genetics N1 - Publication Type: Editorial; Comment UR - https://doi.org/10.1177/0310057X1204000402 ER -