[1] North Dakota State Univ, Sch Nursing, Fargo, ND 58108 USA
[2] North Dakota State Univ, Sch Nursing, Practice, Fargo, ND USA
[3] North Dakota State Univ, Sch Pharm, Practice, Fargo, ND USA
[4] North Dakota State Univ, Sch Pharm, Pharm Practice, Fargo, ND USA
[5] North Dakota State Univ, Dept Stat, Fargo, ND USA
[6] North Dakota State Univ, Tobacco Prevent & Control, Sch Nursing, Fargo, ND USA