APA (7th ed.) Citation

Ryu, K., Fukutomi, Y., Nakatani, E., Kamide, Y., Sekiya, K., Ishikawa, T., . . . Masuzaki, H. Association between low serum testosterone level and severe asthma among elderly women. Elsevier.

Chicago Style (17th ed.) Citation

Ryu, Kai, et al. Association Between Low Serum Testosterone Level and Severe Asthma Among Elderly Women. Elsevier.

MLA (9th ed.) Citation

Ryu, Kai, et al. Association Between Low Serum Testosterone Level and Severe Asthma Among Elderly Women. Elsevier.

Warning: These citations may not always be 100% accurate.