Problem: Suppose you're investigating research on the effects of music on anxiety in people. Answer the question by reading the following passage:
The impact of listening to pleasant natural sounds on anxiety and physiologic parameters in patients undergoing coronary angiography: A pragmatic quasi-randomized-controlled trial
Article: The impact of listening to pleasant natural sounds on anxiety and physiologic parameters in patients undergoing coronary angiography: A pragmatic quasi-randomized-controlled trial
1. Summarize the article, what case is described in the article.
2. What methods were used and what findings were obtained.