Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S1297-9589(11)00227-X
Klinefelter syndrome	free resource	Genetic Alliance	https://www.diseaseinfosearch.org/result/4010
Klinefelter Syndrome	free resource	MedlinePlus Health Information	https://medlineplus.gov/klinefeltersyndrome.html