Author contributions
AMO, NB, MM, NNB
MBx, OT, SST, MBu and TT led the development of the concept and study design and initially drafted the study protocol. NH provided statistical expertise. SK, AMO, AES, OB, TEVS, YCH, DVG, SRSW, WZ, MD and VMZS wrote the Burkina Faso country components and contributed to overall study design. GU, YJ, RC, SK, SVVK, AS, TSN, AHS, NB, VP, CSJ, MC and DB wrote the India country components and contributed to overall study design. SM, FS, VM, NM, DN, BNR, TJK and MM wrote the Rwanda country components and contributed to overall study design. MM, CC, NC, RM, CP, KK,NO, MN, SBM, AM, VS and NNB wrote the Zambia country components and contributed to overall study design. AEL and FL provided expertise and contributed to the costing and digital interventions, and logic model sections respectively. All authors read and approved the final manuscript.