Shall we try: "Yisi Zhou et al. (2011) concluded that communication and trust were the two main factors affecting physician-patient relationships. In their sample, they observed a lack of communication between physicians and patients, and a lack of trust of patients in their physicians." There are two components in this sentence: 1. Conclusion giving rise to a general theory 2. Observations relating to a particular sample.

The study (Yisi Zhou et at 2011) found that the two key influences on physician-patient relationships are lack of communication, and a lack of trust by the patients.

Physician-patient relationships are getting influenced by the main factor of lacking of communication between them and also patients' trust to their physicians.