Derek S Drew

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Five adult patients with vascular malformations in the parotid region are described. Three of these patients had lumps in the parotid gland clinically indistinguishable from parotid tumours: one had a diffuse swelling of the check, and the fifth had a pulsatile tumour in the deep lobe of the gland. Two patients had a characteristic sign-the lump in the(More)
Two major factors to be considered in prequalifying construction contract bidders are the likely costs and risks to be faced by the client upon award of the contract. Prequalification of too many bidders, although lowering client costs, increases risks and causes an excessive overhead on the bidding process. A method of assessing the relative cost and risk(More)
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