Trust chief executive James Birrell emphasised that the patients received planned and constructive care.
And Birrell reckons Irish cricket can only get bigger following the performances of his side in the Caribbean.
"There is still a year to go before I step down, and what a year that promises to be, " said Birrell.
Johnston also thanked Adrian Birrell, who now leaves his post as coach to be replaced by former West Indies star Phil Simmons.
"It has become increasingly difficult for myself and my wife Susan to balance two careers when you have two young children, " explained Birrell.
Simmons, who has been assisting current Ireland coach Adrian Birrell for much of the World Cup, will lead the side at least until the 2009 qualifying tournament.
But he admits it will be tough to follow inspirational South African Birrell, who has played a key role in Ireland's recent march to the world stage.
Ireland have enjoyed remarkable success under Birrell, including winning the Inter-continental Cup for the first time with a six-wicket victory over Kenya in October's final in Namibia.
The white Skoda car involved in the incident was abandoned in Birrell Road, Milngavie and the suspect made off on foot in the direction of Clober golf course.
The Belfast schoolteacher, who made he international debut against Wales in 1995, believes that South African coach Adrian Birrell has been the mastermind to Ireland's progress over the past two seasons.
Despite initial concerns about the loss of experience from the classroom, Timothy Birrell, who represents secondary teachers on the council's education committee, said the overall experience had been a positive one.
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With virtually a professional regime in place, Birrell has guided his side to the 2007 ICC World Cup for the first time although they lost to Scotland in the recent Trophy final in Dublin.
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