Graham H. Cox

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Life on Earth is characterized by strong diversity skewness: related lineages typically show pronounced variation in diversification success, and clades contain hyperdiverse and depauperate subclades. Previous studies have documented diversity skewness only for entire (global) clades. We demonstrate methods for measurement and significance testing of(More)
BACKGROUND To determine total upper limb function following selective neck dissection over a mean follow-up of 1.6 years. METHODS A retrospective questionnaire study in a tertiary head and neck surgical unit. One hundred forty-eight patients who underwent selective neck dissection for head and neck cancer from January 2000 to December 2005 were invited to(More)
Host shifting by phytophagous insects may play an important role in generating insect diversity by initiating host-race formation and speciation. Models of the host shifting process often invoke reduced rates of natural enemy attack on a novel host in order to balance the maladaptation expected following the shift. Such “enemy-free space” has been(More)
Spontaneous cervical lymphocoeles are extremely rare. Their surgical management can pose many challenges with the lack of clear surgical planes potentiating risks. We present the case of a patient with an extensive right-sided cervical lymphocoele. Surgical excision would have involved extensive surgery with risk to the great vessels and lungs. We describe(More)
We consider a second-order, selfadjoint elliptic operator L on a smooth one-parameter family of domains {Ωt}t∈[a,b] with no assumptions on the geometry of the Ωt’s. It is shown that the Morse index of L can be equated with the Maslov index of an appropriately defined path in a symplectic Hilbert space constructed on the boundary of Ωb. Our result is valid(More)
OBJECTIVES Dyskeratosis congenita is a rare, inherited bone marrow failure syndrome characterised by telomerase dysfunction. This study aimed to demonstrate the importance of recognising that this condition predisposes individuals to head and neck malignancy, and also to discuss the challenges of treatment in such individuals. CASE REPORT We present the(More)
It has been suggested that motility during sleep bears a reciprocal relation to depth of sleep (Pai, 1950). Kleitman (1932) and Maliniak (1934) describe mechanical or pneumatic systems for determining sleep motility, and Kleitman refers also to a photoelectric device which interpolates movements from the frequency of interruption by the sleeper of a source(More)