preferred_name: Trouble concentrating on things, such as reading the newspaper or watching television in last 2W
preferred_name_lc: trouble concentrating on things, such as reading the newspaper or watching television in last 2w
label: Trouble concentrating on things, such as reading the newspaper or watching television in last 2 weeks
label_lc: trouble concentrating on things, such as reading the newspaper or watching television in last 2 weeks