Bruce has found that he becomes increasingly fatigued after even mild exertion. He discusses his problem with his neighbour, Sam, who recently suffered from a similar problem. Sam tells him that a megadose of vitamin B complex completely eradicated his symptoms. Bruce tries Sam's remedy and does feel a little better. This is an example of

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The scenario describes Bruce seeking advice from his neighbor, which is an example of the lay referral network. This is a network of informal advice-seeking channels that exists outside of professional healthcare settings.

Bruce Has Found That He Becomes Increasingly Fatigued After Even