Its analgesic effects are only partially reversed by naloxone, hence indicating that its opioid action is unlikely the sole factor; tramadol's analgesic effects are also partially reversed by Î±2 adrenergic receptor antagonists like yohimbine and the 5-HT3 receptor antagonist, ondansetron.
Array formulas in versions before Excel 2007 cannot handle whole-column references. In Excel 2007, array formulas can handle whole-column references, but this forces calculation for all the cells in the column, including empty cells. This can be slow to calculate, especially for 1 million rows.
If you find Excel array formulas too complex and confusing, you can use one of Excel functions that can naturally process arrays of data (without pressing Ctrl + Shift + Enter). A good example is the SUMPRODUCT function that multiplies values in the specified arrays and returns the sum of those products.