4. NRTI combinations

4.1.1: Most frequent NRTI combinations: reference 1st January 2016

4.1.2: Most frequent NRTI combinations: reference 1st January 2015

4.1.3: Most frequent NRTI combinations: reference 1st January 2014

4.1.4: Most frequent NRTI combinations: reference 1st January 2013

4.1.5: Most frequent NRTI combinations: reference 1st January 2012

4.1.6: Most frequent NRTI combinations: reference 1st January 2011