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Title: A study that followed 500 users and 500 nonusers of oral contraceptives over a 20-year period to ... Post by: lilo on Feb 2, 2018 A study that followed 500 users and 500 nonusers of oral contraceptives over a 20-year period to determine if there were any long-term side effects would be called a:
A) Time series B) Retrospective study C) Prospective study D) Crossover study Title: A study that followed 500 users and 500 nonusers of oral contraceptives over a 20-year period to ... Post by: taylorhovland on Feb 2, 2018 C
Title: A study that followed 500 users and 500 nonusers of oral contraceptives over a 20-year period to ... Post by: lilo on Feb 2, 2018 :worried: Still concerned about the others, I hope you can take a look at them
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