Table 2.

Matching our nine disease areas with Anatomical Therapeutic Classification (ATC) codes

Therapy area	ATC 1 and ATC2 level
Gastroenterology	A
Blood	B
Cardiovascular	C
Skin	D
Cancer	L01; L02a
Central Nervous System	N03; N04; N05; N06; N07b
Infection	J, Pc
Respiratory	R
Vision	S01d

^a L contains four ATC2 codes, but cancer drugs are only included in L01 (Antineoplastic agents) and L02 (Endocrine therapy). L03 and L04 refer to Immunostimulants and Immunosuppresants, respectively

^b N contains seven ATC2 codes, but we have only included the following five ATC2 codes: N03 Antiepileptics; N04 Anti-Parkinson drugs; N05 Psycholeptics; N06 Psychoanaleptics; N07 Other nervous system drugs. N01 refer to Anesthetics and N02 to Analgesics

^c J Anti-infectives for systemic use, P Antiparasitic products, insecticides and repellents

^d Vision does not have a separate ATC1 code, and thus we used an ATC2 code (S01, Ophthalmologicals)