4. NRTI combinations

4.1A: Most frequent NRTI combinations: reference 1st January, 2015

4.1B: Most frequent NRTI combinations: reference 30th June, 2015

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

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

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

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

4.1.5: Most frequent NRTI combinations: reference 1st January 2010