1 INTRODUCTION  
2 DATA SETS & SAMPLE DEFINITION  
  2.1 Initial Selection  
  2.2 Removal of Confused Sources  
3 STACKING METHODS & VALIDATION  
  3.1 Stacking Procedure  
  3.2 Reliability of Stacking Methods and Validity of Broad CO and HI Emission  
4 RESULTS  
  4.1 Neutral and Ionised Gas Outﬂows  
  4.2 Molecular and Atomic Gas Outﬂows  
5 DISCUSSION  
  5.1 Towards a Total, Multiphase Mass Outﬂow Rate  
  5.2 Why Don’t We See Atomic or Molecular Outﬂows?  
  5.3 Can Outﬂows Quench Normal Galaxies?  
6 SUMMARY & CONCLUSIONS  
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