Sentence:  Then , too , the utmost clinical flexibility is necessary in judiciously <WSD>combining</WSD> carefully timed family-oriented home visits , single and group office interviews , and appropriate telephone follow-up calls , if the worker is to be genuinely accessible and if the predicted unhealthy outcome is to be actually averted in accordance with the principles of preventive intervention . 
Meaning of the word marked with <WSD> tags:  have or possess in combination