Luenfield, Bruno (7 July 2009). "An Aging World – demographics and challenges". Gynecological Endocrinology. 24 (1): 1–3. doi:10.1080/09513590701718364. PMID18224537.
nih.gov
ncbi.nlm.nih.gov
Luenfield, Bruno (7 July 2009). "An Aging World – demographics and challenges". Gynecological Endocrinology. 24 (1): 1–3. doi:10.1080/09513590701718364. PMID18224537.