this edition written and researched by Andrew Bender [and five others] this edition written and researched by Oliver Berry [and 4 others] this edition written and researched by Anthony Ham [and nine others] this edition written and researched by Neil Wilson [and nine others] this edition written and researched by Ryan Ver Berkmoes [and 9 others] this edition written and researched by Cristian Bonetto [and nine others] this edition written and researched by Ryan Ver Berkmoes and seven others this edition written and researched by Amy C Balfour [and 4 others] this edition written and researched by Amy C. Balfour [and 5 others] this edition written and researched by Amy C. Balfour [and 6 others]