PT - JOURNAL ARTICLE AU - K Naganuma AU - M Ito AU - Y Aizawa TI - Pneumomediastinum: a cause of chest pain AID - 10.1136/heart.87.5.448 DP - 2002 May 01 TA - Heart PG - 448--448 VI - 87 IP - 5 4099 - http://heart.bmj.com/content/87/5/448.short 4100 - http://heart.bmj.com/content/87/5/448.full SO - Heart2002 May 01; 87