function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fontoura, Paulo & Pilato, Giovanni & Lisi, Oscar & Morais, Paulo', 1],
    ['Forero, Dimitri & Weirauch, Christiane & Baena, Manuel', 2],
    ['Marley, Nigel J. & Mcinnes, Sandra J. & Sands, Chester J.', 1],
    ['Pilato, Giovanni & Binda, Maria Grazia', 2],
    ['Putshkov, Pavel V. & Pluot-Sigwalt, Dominique', 5],
    ['Trygvadóttir, Birna Vár & Kristensen, Reinhardt Møbjerg', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);