PT - JOURNAL ARTICLE AU - William C Dement TI - The study of human sleep: a historical perspective AID - 10.1136/thx.53.2008.S2 DP - 1998 Oct 01 TA - Thorax PG - S2--S7 VI - 53 IP - suppl 3 4099 - http://thorax.bmj.com/content/53/suppl_3/S2.short 4100 - http://thorax.bmj.com/content/53/suppl_3/S2.full SO - Thorax1998 Oct 01; 53