Onset symptoms, Tobacco smoking, and progressive-onset phenotype are associated with a delayed onset of multiple sclerosis, and marijuana use with an earlier onset

- Tao, Chunrong, Simpson, Steve, Kilpatrick, Trevor, Williams, David, Lechner-Scott, Jeanette, Shaw, Cameron, Chapman, Caron, Coulthard, Alan, Pender, Michael P., Valery, Patricia, Taylor, Bruce V., Blizzard, Leigh, Lucas, Robyn M., Ponsonby, Anne-Louise, Broadley, Simon, van der Mei, Ingrid, Dear, Keith, Dwyer, Terry

Higher latitude is significantly associated with an earlier age of disease onset in multiple sclerosis

- Tao, Chunrong, Simpson, Steve, Duquette, Pierre, Girard, Marc, Grand'Maison, Francois, Grammond, Pierre, Alroughani, Raed, Terzi, Murat, Oreja-Guevara, Celia, Sajedi, Seyed Aidin, Iuliano, Gerardo, Sola, Patrizia, van der Mei, Ingrid, Lechner-Scott, Jeannette, Van Pesch, Vincent, Pucci, Eugenio, Bergamaschi, Roberto, Barnett, Michael, Ramo, Cristina, Singhal, Bhim, Spitaleri, Daniele L. A., Slee, Mark, Verheul, Freek, Blizzard, Leigh, Fernández Bolaños, Ricardo, Amato, Maria Pia, Cristiano, Edgardo, Granella, Franco, Hodgkinson, Suzanne, Fiol, Marcela, Gray, Orla, McCombe, Pamela, Saladino, Maria Laura, Sánchez Menoyo, José Luis, Havrdova, Eva, Shuey, Neil, Vucic, Steve, Shaw, Cameron, Deri, Norma, Arruda, Walter Oleschko, Butzkueven, Helmut, Spelman, Tim, Taylor, Bruce V., Horakova, Dana, Shaygannejad, Vahid, Lugaresi, Alessandra, Izquierdo, Guillermo, Trojano, Maria