function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boldrini, R.', 1],
    ['Boldrini, Rafael & Lima, Lucas Ramos Costa', 2],
    ['Do, Jeane M. C. & Salles, Frederico F. & Hamada, Neusa', 10],
    ['Domínguez, Eduardo & Grillet, Maria-Eugenia & Nieto, Carolina', 2],
    ['Lima, Lucas R. C.', 2],
    ['Nascimento, Stênio Raniery de Sousa & Lima, Lucas Ramos Costa', 4],
    ['Orlando, Thales Yann & Krolow, Tiago Kütter & Boldrini, Rafael', 1],
    ['Orlando, Thales Yann & Salles, Frederico Falcão', 4],
    ['Takiya, Daniela Maeda & Santos, Allan Paulo Moreira', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);