1 INTRODUCTION

2 BACKGROUND AND RELATED WORK  
2.1 Background  
2.2 Related Work  

3 METHODOLOGY OF SYSTEMATIC SURVEY  
3.1 Sources of Information  
3.2 Search Terms  
3.3 Study Selection  
3.4 Study Quality Assessment  
3.5 Selection Verification  

4 RESULTS  

5 THREATS TO VALIDITY

6 CONCLUSION