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Norwegian Univ Sci & Technol NTNU, Fac Med & Hlth Sci, Dept Publ Hlth & Nursing, Trondheim, Norway
Trondheim Reg & Univ Hosp, St Olavs Hosp, Dept Obstet & Gynecol, Trondheim, Norway Univ Sri Jayawardenapura, Fac Med Sci, Dept Community Med, Colombo, Sri Lanka