RT Journal Article SR Electronic T1 Muscarinic receptor subtypes and smooth muscle function JF Pharmacological Reviews JO Pharmacol Rev FD American Society for Pharmacology and Experimental Therapeutics SP 531 OP 565 VO 48 IS 4 A1 RM Eglen A1 SS Hegde A1 N Watson YR 1996 UL http://pharmrev.aspetjournals.org/content/48/4/531.abstract AB