I agree with you that you do not need a comma in this position.
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AnonymousI don't think I need a comma, but someone disagrees.I agree, but I would certainly insert one as noted above in
"Over an eight-year period [,] Dr. Oscar Janiger gave LSD-25 to more than 950 men and women(,) ranging in age from 18 to 81 and coming from all walks of life."
AnonymousI don't think I need a comma, but someone disagrees.In BrE, Dr (with no period) is the short form.
"Over an eight-year period Dr. Oscar Janiger gave LSD-25 to more than 950 men and women(,) ranging in age from 18 to 81 and coming from all walks of life."