2.1. PlantLIBRA PFS consumer survey
A cross-sectional 12-month retrospective PFS consumption survey was conducted in Finland and five other European countries. Before initiating the fieldwork, an ethical statement was obtained from the Coordinating Ethics Committee, Hospital District of Helsinki and Uusimaa, Finland. The details of the PlantLIBRA PFS Consumer Survey and its data collection procedures have been described elsewhere (Garcia-Alvarez et al., 2014). In this survey, the sample size in Finland was 401 PFS consumers. They came from four cities located in different parts of the country; Helsinki, Turku, Kuopio and Oulu. The gender and age group quotas were set as follows: 75% adults (18–59 years) and 25% elderly adults (60 years and over) with 50% males and 50% females.