About the Authors

Lars Åke Persson

lars-ake.persson@kbh.uu.se

Affiliation International Maternal and Child Health, Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden

Nguyen T. Nga

Affiliations International Maternal and Child Health, Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden, Vietnam-Sweden Uong Bi General Hospital, Uong Bi, Viet Nam

Mats Målqvist

Affiliation International Maternal and Child Health, Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden

Dinh Thi Phuong Hoa

Affiliation Hanoi School of Public Health, Hanoi, Viet Nam

Leif Eriksson

Affiliation International Maternal and Child Health, Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden

Lars Wallin

Affiliation Department of Neurobiology, Care Sciences and Society, Division of Nursing, Karolinska Institutet, Stockholm, Sweden, and School of Health and Social Studies, Dalarna University, Falun, Sweden

Katarina Selling

Affiliation International Maternal and Child Health, Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden

Tran Q. Huy

Affiliation Ministry of Health, Hanoi, Viet Nam

Duong M. Duc

Affiliations International Maternal and Child Health, Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden, Hanoi School of Public Health, Hanoi, Viet Nam

Tran V. Tiep

Affiliation Vietnam-Sweden Uong Bi General Hospital, Uong Bi, Viet Nam

Vu Thi Thu Thuy

Affiliation Provincial Health Bureau, Quang Ninh Province, Viet Nam

Uwe Ewald

Affiliation International Maternal and Child Health, Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LÅP NTN MM DTPH LE LW UE. Performed the experiments: LÅP NTN MM DTPH LE LW KS TQH DMD TVT VTTT UE. Analyzed the data: LÅP MM KS. Wrote the first draft of the manuscript: LÅP. Contributed to the writing of the manuscript: LÅP NTN MM DTPH LE LW KS TQH DMD TVT VTTT UE. ICMJE criteria for authorship read and met: LÅP NTN MM DTPH LE LW KS TQH DMD TVT VTTT UE. Agree with manuscript results and conclusions: LÅP NTN MM DTPH LE LW KS TQH DMD TVT VTTT UE.