Comment on

• Analysis of circulating tumor DNA to monitor metastatic breast cancer.

  Dawson SJ, Tsui DW, Murtaza M, Biggs H, Rueda OM, Chin SF, Dunning MJ, Gale D, Forshew T, Mahler-Araujo B, Rajan S, Humphray S, Becq J, Halsall D, Wallis M, Bentley D, Caldas C, Rosenfeld N. Dawson SJ, et al. N Engl J Med. 2013 Mar 28;368(13):1199-209. doi: 10.1056/NEJMoa1213261. Epub 2013 Mar 13. N Engl J Med. 2013. PMID: 23484797
• Circulating tumor DNA to monitor metastatic breast cancer.

  Cristofanilli M, Fortina P. Cristofanilli M, et al. N Engl J Med. 2013 Jul 4;369(1):93. doi: 10.1056/NEJMc1306040. N Engl J Med. 2013. PMID: 23822789 No abstract available.
• Circulating tumor DNA to monitor metastatic breast cancer.

  Weiss L, Hufnagl C, Greil R. Weiss L, et al. N Engl J Med. 2013 Jul 4;369(1):93. doi: 10.1056/NEJMc1306040. N Engl J Med. 2013. PMID: 23822790 No abstract available.