A longitudinal study using MSC-CM from the same cell mass (i.e., 2×106 human MSCs) revealed a distinct survival benefit compared to vehicle (P<0.032) and fibroblast (P<0.026) concentrated medium (Fig. 2A).
Method Longitudinal study using the Avon Longitudinal Study of Parents and Children (ALSPAC) birth cohort.
However another study using the same longitudinal population as our study, found no association between cannabis and subsequent risk of completed suicide after adjusting for confounders [ 21].
Design Register based longitudinal study using within patient design.
Qualitative, longitudinal study using individual and group interviews.
This questionnaire has been used in a longitudinal study in the same area of Tianjin [ 20– 25].
Secondly, this study was performed cross-sectionally, not longitudinally; different types of headaches occurring in the same patient cannot be evaluated cross-sectionally and require longitudinal studies using headache diaries [ 29].
Ultimately, a longitudinal study on the same or similar populations might help to verify this hypothesis.
Moreover, the use of a longitudinal study design using in vivo micro-CT allows the quantification of subchondral bone in the same animal over time.
The study, published last year in the journal Sex and Marital Therapy, is titled "A Longitudinal Study of Attempted Religiously Mediated Sexual Orientation Change" and anti-gay campaigners claim it shows how spiritual "therapy" can be used to change sexual orientation.
