PT - JOURNAL ARTICLE AU - Saadat, M AU - Khalili, M TI - Offspring sex ratio at birth in mountain climbers AID - 10.1136/jech.2008.078824 DP - 2009 Jul 01 TA - Journal of Epidemiology and Community Health PG - 590--591 VI - 63 IP - 7 4099 - http://jech.bmj.com/content/63/7/590.2.short 4100 - http://jech.bmj.com/content/63/7/590.2.full SO - J Epidemiol Community Health2009 Jul 01; 63