“…These five studies used the Euromonitor Passport Global Market Information Database, which collects sales volume data, from many countries worldwide, from various sources including trade associations, industry bodies, company financial reports, and official government statistics [ 31 , 33 , 35 , 38 , 39 ]. The others six studies in this systematic review used purchase data from HBS [ 30 , 32 , 34 , 36 , 37 , 40 ]. To classify food according to the purpose and extent of processing, six studies [ 30 , 32 , 33 , 34 , 36 , 37 ] used NOVA [ 7 ], a system that was launched in 2010, and one used a classification developed at the International Food Policy Research Institute [ 40 ].…”