LBM features are described in Table 2 . LBMs in Bac Giang province in Viet Nam were either open every day (n = 4) or periodically (n = 5). Periodic markets were open 6 or 12 days per month. LBMs in Ha Noi province were grouped as either retail and mixed markets (n = 17), hosting from 2 to 13 sellers, or wholesale markets (n = 4), which were the largest markets, hosting from 30 to 80 sellers. Cambodian LBMs were grouped as either urban markets (n = 4), located in Phnom Penh or its close proximity, or peri-urban markets (n = 4), in other provinces.