title: Basics of research (Part 4): research study design (Part 2).
authors.affiliation: University of Utah College of Nursing, Salt Lake City 84112, USA.
authors.forename: C B
authors.initials: CB
authors.lastname: Thompson
authors.forename: E A
authors.initials: EA
authors.lastname: Panacek
authors.forename: E
authors.initials: E
authors.lastname: Davis
mesh_terms: D003625:Data Collection / Q000379:methods; D003627:Data Interpretation, Statistical; D006302:Health Services Research / Q000379:methods*; D011897:Random Allocation; D015203:Reproducibility of Results; D012107:Research Design; D012494:Sampling Studies; D014481:United States