[1] Med Univ Bialystok, Dept Obstet Gynaecol & Matern Care, Szpitalna 37, PL-15295 Bialystok, Poland
[2] Seattle Univ, J Bushman Endowed Chair Nursing, Robert Wood Johnson Fdn Execut Nurse Fellow 2012, Coll Nursing, 901 12th Ave, Seattle, WA 98122 USA
[3] Med Univ Bialystok, Szpitalna 37, PL-15295 Bialystok, Poland