Elena Rey

A randomized controlled trial comparing split and subunit influenza vaccines in adults in Colombia.

Sabine Arnoux, C. Deroche, A. Morales, 2003, Medicina.

Costs and benefits of influenza vaccination and work productivity in a Colombian company from the employer's perspective.

A. Tasset-Tisseau, F. Baron-Papillon, Alain Follet, 2004, Value in health : the journal of the International Society for Pharmacoeconomics and Outcomes Research.