function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ayón-Parente, Manuel & Hendrickx, Michel E.', 2],
    ['Ayón-Parente, Manuel & Hendrickx, Michel E. & Lemaitre, Rafael', 3],
    ['Craig, Catherine W. & Felder, Darryl L.', 1],
    ['De Matos-Pita, Susana S. & Ramil, Fran', 1],
    ['Lemaitre, Rafael & Felder, Darryl L.', 2],
    ['Marin, Ivan', 1],
    ['Naderloo, Reza & Türkay, Michael', 1],
    ['Nucci, Paulo Ricardo & Melo, Gustavo Augusto Schmidt De', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);