1. Introduction

2. The sample

3. Observations

4. Continuum maps

5. Molecular line emission

6. The many faces of dusty molecular tori: dust, CO and $\mathtt{HCO^{+}}$ emission

7. Dusty molecular tori and the processing of $\mathbf{x}$-rays

8. The radial distribution of molecular gas: the imprint of feedback?

9. Summary and outlook