Prevalence of treatment resistance and clozapine use in early intervention services oleh Imogen Stokes, Siân Lowri Griffiths, Rowena Jones, Linda Everard, Peter B. Jones, David Fowler, Joanne Hodgekins, Tim Amos, Nick Freemantle, Vimal Sharma, Max Marshall, Swaran P. Singh, Max Birchwood, Rachel Upthegrove