1. Introduction | 2. Model | 2.1 Zero-inflated mediators | 2.1.1 Zero-inflated log-normal (ZILoN) mediators | 2.1.2 Zero-inflated negative binomial (ZINB) mediators | 2.1.3 Zero-inflated Poisson (ZIP) mediators | 2.2 Probability mechanism for observing false zeros | 2.3 Mediation effect and direct effect | 2.3.1 Effects for ZILoN mediators | 2.3.2 Effects for ZINB mediators | 2.3.3 Effects for ZIP mediators | 3. Installing the R package | 4. Main function MAZE() | 4.1 Input arguments | 4.2 Outputs | 5. Example