SEARCH Articles Figures Tables Carbonyl complexes main group parallels Clinical trials parallel groups Clinical trials parallel-group design Concurrent controls parallel-group design Concurrently controlled, parallel group design Main Group Parallels with Binary Main Group Parallels with Binary Carbonyl Complexes Organometallic compounds main group parallels Parallel Conformation of 2-Cyanoethyl Group Parallel group design Parallel group studies/designs/trials Parallel group study design Parallel group techniques Parallel-group studies Parallels Between Main Group and Organometallic Chemistry Placebo-controlled, parallel group design