Randomized Controlled Trial

Paravertebral blockade for day-case breast augmentation: a randomized clinical trial.

Anesth. Analg.. 2012 Nov 1;115(5):1053-9.
Randomized Controlled Trial

Guided paravertebral blocks with versus without clonidine for women undergoing breast surgery: a prospective double-blinded randomized study.

Anesth. Analg.. 2013 Jul 1;117(1):252-8.
Randomized Controlled Trial

A prospective comparison of continuous wound infiltration with ropivacaine versus single-injection paravertebral block after modified radical mastectomy.

Anesth. Analg. 2008 Mar 1;106(3):997-1001, table of contents.