Both the UK National Health Service and the American Academy of Pediatrics recommend that mothers exclusively breastfeed until about 6 months of age and then begin to introduce solid foods.
원문출처 : https://www.cnn.com/2018/07/09/health/infant-sleep-solid-food-study/index.html
원문출처 : https://www.cnn.com/2018/07/09/health/infant-sleep-solid-food-study/index.html