On 19 May 2014 AstraZeneca rejected a "final offer" from Pfizer of £55 per share, which valued the company at £69.4billion (US$117billion). The companies had been meeting since January 2014. If the takeover had proceeded, Pfizer would have become the world's biggest drug maker. The transaction would also have been the biggest foreign takeover of a British company. Many in Britain, including politicians and scientists, had opposed the deal. In July 2014 the company entered into a deal with Almirall to acquire its subsidiary Almirall Sofotec and its lung treatments including the COPD drug, Eklira. The US$2.1 billion deal included an allocation of US$1.2 billion for development in the respiratory franchise, one of AstraZeneca's three target therapeutic areas announced the year before. In August 2014 the company announced it had entered into a three-year collaboration with Mitsubishi Tanabe Pharma on diabetic nephropathy. In September 2014 the company would join forces with Eli Lilly in developing and commercialising its candidate BACE inhibitor – AZD3292 – used for the treatment of Alzheimer's disease. The deal could yield up to US$500 million for the company. In November 2014 the company's biologics R&D operation, MedImmune, agreed to acquire Definiens for more than US$150 million. The company also began a Phase I/II trial collaboration with Pharmacyclics and Janssen Biotech investigating combination treatments. Also in November of the same year, the company agreed to sell its lipodystrophy treatment business to Aegerion Pharmaceuticals for more than US$325 million. In December, the company received accelerated FDA approval for Olaparib in the treatment of women with advanced ovarian cancer who have a BRCA genetic mutation. A major criterion governing the drugs approval was, on average, its ability to shrink tumours in patients for 7.9 months.