Prospective comparison of AR-V7 transcripts from whole blood and circulating tumor cells in castration-resistant prostate cancer patients undergoing treatment with androgen-receptor signaling inhibitors: The PEARL trial. - Heck, Matthias; Tauber, Robert; Sarhadi, Shamim; Jaeger, Marion; von Tucher, Julia; Westhofen, Thilo; Püchler, Katharina; Lunger, Lukas; Nawroth, Roman; Gschwend, Juergen E.; Ruland, Jürgen; Winter, Christof (Journal of Clinical Oncology)