The Couples
Here is the list of couples who were included in the two studies. Couples 1 to 1300 were included in the 2005 study, couples 1301 to 2600 in the 2019 study.
Here is the list of couples who were included in the two studies. Couples 1 to 1300 were included in the 2005 study, couples 1301 to 2600 in the 2019 study.