1. INTRODUCTION

2. OBSERVATIONS
2.1. ALMA 1 mm follow up observations
2.2. ALMA 3 mm scans
2.3. APEX/FLASH [C II] follow-up
2.4. APEX/SEPIA CO follow-up
2.5. APEX/Z-Spec spectrum
2.7. Ancillary spectroscopic observations

3. RESULTS
3.1. Targeted ALMA 1 mm observations
3.3. New ALMA Cycle 1 3 mm scans

4. DISCUSSION
4.1. The redshift distribution
4.2. Selection effects

5. SUMMARY AND CONCLUSION