PT - JOURNAL ARTICLE AU - Leszek Pstras TI - Valsalva manoeuvre using a syringe: physics and implications AID - 10.1136/emermed-2016-206318 DP - 2016 Nov 01 TA - Emergency Medicine Journal PG - 831--831 VI - 33 IP - 11 4099 - http://emj.bmj.com/content/33/11/831.short 4100 - http://emj.bmj.com/content/33/11/831.full SO - Emerg Med J2016 Nov 01; 33