TY - RPRT TI - A rapid and simple method for counting crevicular polymorphonuclear leucocytes. AU - E Andersen AU - G Cimasoni PY - 1993 DO - 10.1111/j.1600-051x.1993.tb00710.x UR - https://pubmed.ncbi.nlm.nih.gov/8227452/ ID - 8227452 ER -