Shortening first section
Shortening second section
Shortening 3.0
Shortening 3.1
Shortening 3.1.1
Shortening 3.1.2
Shortening 3.2
Shortening 4.1
Shortening 4.1 really
Shortening 4.2
Shortening 4.2.1
Shortening 4.2.2
Shortening 4.2.3
Shortening 5
Shortening 6
Cut down abstract
Removed redundant section headings