Some multivariable Gaussian hypergeometric extensions of the Preece theorem

Some generalisations of the Preece theorem involving the product of two Kummer's functions F-1(1) are obtained using Dixon's theorem and some well-known identities. Its special cases yield various new transformations and reduction formulae involving Pathan's quadruple hypergeometric function F-p((4)) and Srivastava's quadruple hypergeometric function F-(4) and triple hypergeometric function F-(3). Some known results of Preece, Pathan and Bailey are also obtained as special cases.