Entity Manager returns duplicate copies of a @OneToMany related Entity

I am developing an application to help my office track and manage reviews. In the application, I am using JPA 2.0 with Hibernate 3.6.3 as my underlying provider. I am also using spring to inject the persistence context into my DAO. I have built the domain such that there is a Review, a Participant and a Role Entity.

The problem I am having is when I get a Review from the Entity Manager there are duplicate copies of the same Participant(i.e. same ID) in the list of participants if the Participant has more than one Role. I have also found the number of duplicates is directly related to the number Roles (i.e. if the a Participant has 3 Roles then the Participant occurs 3 times in the Review's list of participants)

I have used straight Hibernate before but this is my first time using JPA so I am sure I have configured something wrong. I just don't know what it is.

Here is the code:

Review:

@Entity
public class Review extends BaseModel{

@ManyToOne(cascade=CascadeType.ALL, fetch=FetchType.EAGER, optional=false)
private Item item;

@Column(name="ISNEW", nullable=false)
private boolean isNew;

@Enumerated(EnumType.STRING)
@Column(name="STATUS", nullable=false)
private ReviewStatus status;

@Enumerated(EnumType.STRING)
@Column(name="PHASE", nullable=false)
private Phase phase;

@Enumerated(EnumType.STRING)
@Column(name="REVIEW_TYPE", nullable=false)
private ReviewType reviewType;

@OneToMany( cascade=CascadeType.ALL, fetch=FetchType.EAGER)
private List<Participant> participants;

@OneToMany(cascade=CascadeType.ALL)
private List<Defect> defects;

@Column(name="START_DATE", nullable=false)
private Date startDate;

@Column(name="MEETING_DATE", nullable=false)
private Date meetingDate;

@Column(name="FINISH_DATE")
private Date finishDate;

@Column(name="DURATION", nullable=false)
private Double duration;

public Item getItem()
{
    return item;
}
public void setItem(Item item)
{
    this.item = item;
}   
public