References:
1. Sub-classification of macrolides:
Adriaenssens N, Coenen S, Versporten A, Muller A, Minalu G, Faes C, et al. European Surveillance of Antimicrobial Consumption (ESAC): outpatient macrolide, lincosamide and streptogramin (MLS) use in Europe (1997-2009). J Antimicrob Chemother. 2011 Dec;66 Suppl 6:vi37-45.
2. Sub-classification of quinolones
Adriaenssens N, Coenen S, Versporten A, Muller A, Minalu G, Faes C, et al. European Surveillance of Antimicrobial Consumption (ESAC): outpatient quinolone use in Europe (1997-2009). J Antimicrob Chemother. 2011 Dec;66 Suppl 6:vi47-56.
3. Classification of antivirals for systemic use based on their main indication
Adriaenssens N, Coenen S, Kroes AC, Versporten A, Vankerckhoven V, Muller A, et al. European Surveillance of Antimicrobial Consumption (ESAC): systemic antiviral use in Europe. J Antimicrob Chemother. 2011 Aug;66(8):1897-905.