| genSimDataGLMEM | Generate simulated data from logistic mixed effects model based on the AMD data | 
| getScore | Get data frame for the function riskPredict | 
| powerCal | Calculate the power for testing delta=0 | 
| powerCalData | Calculate the power for testing delta=0 based on a dataset | 
| riskPredict | Assessing risk prediction performance for clustered data | 
| riskPredictDiff | Difference of two risk prediction rules for clustered data |