Source: https://www.cambridge.org/core/journals/development-and-psychopathology/article/effects-of-an-attachmentbased-intervention-on-daily-cortisol-moderated-by-dopamine-receptor-d4-a-randomized-control-trial-on-1-to-3yearolds-screened-for-externalizing-behavior/01F6FD4F410A19F657EBDE5C96A2F777