Varicose Veins (The Mayo Clinic, Treatment & Diagnosis) https://www.mayoclinic.org/diseases-conditions/varicose-veins/diagnosis-treatment/drc-20350649
National Headache Foundation: The complete headache chart http://www.headaches.org/2008/12/11/the-complete-headache-chart
American Public Health Association: Universal Access to Contraception "The development of safe, effective contraception is widely considered to be one of the greatest public health achievements of the 20th century."
https://www.apha.org/policies-and-advocacy/public-health-policy-statements/policy-database/2015/12/17/09/14/universal-access-to-contraception
ACOG (American Congress of Obstetricians and Gynecologists) on contraception as a "medical necessity" https://www.acog.org/About-ACOG/News-Room/Statements/2017/Nations-Ob-Gyns-Denounce-Trump-Administrations-Attack-on-Contraception