Pfitzner C, Schröder I, Scheungraber C, Dogan A, Runnebaum IB, Dürst M, Häfner N.

Sci Rep. 2014 Feb 5;4:3970. doi:10.1038/srep03970

Digital-Direct-RT-PCR: a sensitive and specific method for quantification of CTC in patients with cervical carcinoma.

Fixation also reduces contamination from cell lysis.