Miller has been suffering with extreme fatigue after games and has had to spend much of the week recovering rather than training.
The results of the blood tests were described as an 'encouraging boost' by the League Two club.
The latest gossip and rumours from the newspapers and online:The Sun says Chelsea striker DIEGO COSTA will call a truce
Pep Guardiola conceded Manchester City's Premier League title bid could be over after the heaviest domestic league defeat of his
It feels right again said Gary Neville, after United secured a 2-1 victory over Middlesbrough with an 86th minute winner
Wayne Rooney has the chance to officially break Sir Bobby Charlton's Manchester United all-time scoring record on Sunday - but
Manchester United host arch-rivals Liverpool at Old Trafford on Sunday.
It may only be a couple of weeks old but 2017 hasnt been a good year so far for Liverpool.