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by Egger, Matthias; Higgins, Julian P. T.; Davey Smith, George
by Egger, Matthias; Razum, Oliver; Rieder, Anita
by Egger, Matthias; Davey Smith, George; Altman, Douglas
by Egger, Matthias
by Tobias Huber; Josef Burger; Alexander Egger; et al.
by Josef Burger; Alexander Egger; Stefan Heschl; et al.
by Burgschwentner, Joachim; Egger, Matthias; Barth-scalmani, Gunda
by Editor: Matthias Egger; Editor: George Davey Smith; Editor: Douglas Altman
by Egger, Matthias; Smith, George Davey; Altman, Douglas
by Egger, Matthias; Razum, Oliver