Hospital health promotion, Number 12, which was selected by proportion of population size, and then select groceries shop by random lottery. All 346 stores
Hospital Health Promotion, 12 of which were selected by a larger proportion of the population, then selected by a random draw from the grocery store 346 stores.
Health promoting hospital, the number of 12 of the equivalence ratio with size ประชากรแล้ว selected by random lottery. Grocery store From all 346 shop.