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	1.	Effect of bromhexine on ventilatory capacity in patients with a variety of chest diseases. [electronic resource] by Gent, M Knowlson, P A Rime, F J Producer: 19691230 In: Lancet (London, England) vol. 2 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	Evaluation of clonidine in prophylaxis of migraine. Double-blind trial and follow-up. [electronic resource] by Shafar, J Tallett, E R Knowlson, P A Producer: 19720503 In: Lancet (London, England) vol. 1 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	3.	Clonidine in migraine. [electronic resource] by Pollard, P A Shafar, J Knowlson, P A Tallett, E R Producer: 19720807 In: Lancet (London, England) vol. 1 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)

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