function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bezark, Larry G. & Santos-Silva, Antonio', 1],
    ['Botero, Juan Pablo & Almeida, Lúcia M.', 2],
    ['Botero, Juan Pablo & Heffern, Daniel & Santos-Silva, Antonio', 1],
    ['Chapman, Eric G. & Richards, Austin B. & Dupuis, Julian R.', 1],
    ['Heffern, Daniel & Botero, Juan Pablo & Santos-Silva, Antonio', 1],
    ['Heffern, Daniel & Santos-Silva, Antonio', 2],
    ['Pérez-Hernández, Cisteil Xinum', 1],
    ['Santos-Silva, Antonio & Tirant, Stéphane Le', 2],
    ['Tirant, Stéphane Le & Santos-Silva, Antonio', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    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);