Many of his Anxiety research pursuits overlap with Psychosocial and Mood. He integrates several fields in his works, including Mood and Anxiety. His Artificial intelligence study frequently draws connections between adjacent fields such as Consistency (knowledge bases), Delphi method and Interpretability. The study of Consistency (knowledge bases) is intertwined with the study of Artificial intelligence in a number of ways. He integrates Pathology with Medical physics in his research. Dirk L. Knol integrates several fields in his works, including Medical physics and Pathology. His Internal medicine study often links to related topics such as Body mass index. His Physical therapy study frequently draws connections to adjacent fields such as Chronic pain. The study of Chronic pain is intertwined with the study of Physical therapy in a number of ways.