[1] Univ Padjadjaran, Fac Med, Dept Publ Hlth, Bandung 40161, West Java, Indonesia
[2] Univ Binawan, Fac Keperawatan & Kebidanan, Prodi Kebidanan, DKI Jakarta 13630, Indonesia
[3] Univ Sebelas Maret, Fac Med, Midwifery Study Program, Surakarta 57126, Central Java, Indonesia
[4] Univ Muhammadiyah Pekajangan Pekalongan, Fac Hlth Sci, Midwifery Program, Pekalongan 51172, Central Java, Indonesia
[5] Univ Brunei Darussalam, PAPRSB Inst Hlth Sci, Nursing & Midwifery Program, Bandar Seri Begawan 1410, Brunei
[6] Poltekkes Kemenkes Yogyakarta, Dept Midwifery, Yogyakarta 55143, Indonesia
[7] Yale Univ, Sch Nursing, New Haven, CT 06477 USA