PT - JOURNAL ARTICLE AU - Zavalishina, Yelena TI - Gravity DP - 2020 Jul 01 TA - Canadian Family Physician PG - 518--518 VI - 66 IP - 7 4099 - http://www.cfp.ca/content/66/7/518.short 4100 - http://www.cfp.ca/content/66/7/518.full SO - Can Fam Physician2020 Jul 01; 66