TY - RPRT TI - Null results when diagnostic tests are imperfect. AU - G Reibnegger AU - A Hausen AU - H Wachter PY - 1989 DO - 10.1016/s0140-6736(89)91880-1 UR - https://pubmed.ncbi.nlm.nih.gov/2573784/ ID - 2573784 ER -