Dissanayake, L., Herath, B., Opatha, J., Jabir, S., Siriwardana, R., Sirisena, K., …Rijsdijk, F. (in press). The Colombo Twin and Singleton Study (COTASS): Piloting the Feasibility of Collecting Nutritional Data and Extension of the Sample to Include Children of Twins. Behavior genetics, 54(1), 63–72. https://doi.org/10.1007/s10519-023-10171-w