For example, GWAS associations have been reported with multiple diseases and traits, such as drinking behavior (CYTL1) [44], cystic fibrosis severity (AHRR) [45], caffeine consumption (CYP1A1) [46], and diastolic blood pressure (CYP1A1) [47], and methylation levels at AHRR have been linked to multiple phenotypes including lung function [48] and BMI [49]. Here, CYP1A1 is linked to cystic fibrosis.