Trial of alginates in throat symptoms: protocol for a pragmatic, multicentre, placebo controlled, double blind, parallel, randomised controlled trial of liquid alginate (Gaviscon A... by David Hamilton, Ruth Wood, Dawn Teare, Miranda Morton, Rebecca Maier, James O’Hara, Tony Fouweather, Julian McGlashan, Julie Thompson, Richard Joyce, Hesther Smith, Lysbeth Evans

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