[1] Seattle Univ, Coll Nursing, 901 12th Ave, Seattle, WA 98122 USA
[2] Washington State Univ, Coll Nursing, POB 1495, Spokane, WA 99210 USA
[3] Edinburgh Napier Univ, Sch Nursing Midwifery & Social Care, Sighthill Campus,9 Sighthill Court, Edinburgh EH11 4BN, Midlothian, Scotland
[4] Buckinghamshire New Univ, High Wycombe Campus,Queen Alexandra Rd, High Wycombe HP11 2JZ, Bucks, England