RT Journal T1 LAb-on-a-chip shows promise in defining and diagnosing cancers JF JAMA JO JAMA YR 1999 FD November 17 VO 282 IS 19 SP 1801 OP 1802 DO 10.1001/jama.282.19.1801 UL http://dx.doi.org/10.1001/jama.282.19.1801 AB