Jarjoura & Krumholz (1998) published a longitudinal study in the late 1990s testing two groups, one in CLTL and a competing program group.
Jarjoura & Krumholz (1998) published a longitudinal study in the late 1990s. These late 1990s were testing two groups. These late 1990s were testing one in CLTL. These late 1990s were testing a competing program group.