Persistent Postmastectomy Pain and Pain-Related Physical and Emotional Functioning With and Without a Continuous Paravertebral Nerve Block: A Prospective 1-Year Follow-Up Assessment of a Randomized, Triple-Masked, Placebo-Controlled StudyBrian M. Ilfeld, Anne M. Wallace, Nisha Malhotra et al.|Annals of Surgical Oncology|2014Cited by 105