Resources:

https://momlovesbest.com/feeding/breast-pumps
https://www.cdc.gov/breastfeeding/recommendations/handling_breastmilk.htm
https://www.llli.org/
https://toxnet.nlm.nih.gov/newtoxnet/lactmed.htm
https://www.ilca.org/why-ibclc/falc
http://www.who.int/topics/breastfeeding/en/