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.
Chelsea visit Arsenal this weekend looking to close in on the Premier League trophy and end the Gunners' title chances.
Manchester United's recent revival, has coincided with their most expensive ever signing (Angel Di Maria), losing his place in the team.
Sports writer Alistair Mason asks whether the Champions League is losing its lustre.
Harry Kane has shot to prominence after breaking through into Spurs' first-team this season.
Manchester United's Ander Herrera has been been nominated for the April PFA Fans' Player of the Month Award.
Chelsea's Eden Hazard has been been nominated for the April PFA Fans' Player of the Month Award.