Reasons for not measuring IAP and frequency of IAP measurements. (a) Stated reasons for not measuring IAP. Out of 109 respondents, 28 denied regularly measuring IAP due to the reasons presented (% of respondents, multiple answers; question 2). (b) Frequency of IAP measurements among those who stated to measure IAP. Of the 109 respondents, 81 elaborated on when to measure IAP (% of respondents, multiple answers; question 2).