Cascading two LNA stages

i have designed 2 seperate LNA circuits, each has its own input and output matching networks, so that each circuit has its own gain and noise figure, and the 2 circuits are matched to a 50 ohm line in the input and output.
But now i want to cascade them, so can i directly do that or i have to make an intermediate matching network (IMN) between the two stages.
And how to design this IMN.
THANKS SO MUCH....

Since the output matching network of the 1st circuit needs a 50 ohm load and the input matching network of the second circuit matches it to a 50 ohm source, I think you can simply cascade them. But it would be better if you have just one matching network between the 2 which would match the input of 2nd to the output of 1st, since you may reduce the number of components and the loss and thus a better Noise Figure.