Sequence generation {16a}
Randomization to the two groups of the study (control and intervention group) will be performed in a ratio of 1:1. Stratified block randomization will be performed according to the characteristic of preferred decision-making at baseline (expressions: physician should decide; patient would like to decide alone; patient and physician should decide together). This is to ensure that participants are evenly distributed within the study groups according to their preferred decision style, since it is assumed that the intervention effect differs according to the individual differences in preferences for decision style.