1. INTRODUCTION

2. DATASETS AND PHOTOMETRIC REDSHIFTS

4. RESULTS
4.2. The SFR-M* and sSFR-M* planes

4.3. The inferred cosmic star formation rate density at z=3.9-4.9

4.4. A>50σ overdensity of 3.9≤z≤4.9 galaxies

5. DISCUSSION AND CONCLUSIONS