The reasons as to why he refused remain unclear. The reasons why amyloid cause diseases are unclear. These skills are dependent on processing of stimuli that is unclear and ambiguous. Whether one causes the other is unclear. The exact creation date is at least somewhat unclear. There is also evidence of damage to the heart of unclear significance. These misarticulations often result in unclear speech. The use of steroids is of unclear evidence. This is mainly due to unclear diagnostic criteria. The mechanism by which may cause cancer is unclear. White left Oasis in early 2004 in somewhat unclear circumstances. Chloroquine is a 4-aminoquinolone compound with a complicated and still unclear mechanism of action. Magnus ruled the two countries until 1047, when he died under unclear circumstances. These had launchers for eight large-diameter missiles whose purpose was initially unclear to NATO. It focuses on energy investment in situations of clear and unclear task difficulty.