function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Hoffman, Leon & Freiwald, André', 9],
    ['Leal, José H.', 1],
    ['Mariottini, Paolo & Smriglio, Carlo & Oliverio, Marco', 1],
    ['Ortega, José Rafael & Gofas, Serge', 2],
    ['Poppe, Guido & Tagaro, Sheila & Goto, Yoshihiro', 1],
    ['Ramalho, Laís V. & Rodríguez-Aporta, Raquel & Gofas, Serge', 1],
    ['Rosenkrantz, Alfred', 1],
    ['Sacchetti, Claudia & Landau, Bernard & Ávila, Sérgio P.', 2],
    ['Sosso, Maurizio & Dell’angelo, Bruno & Bonfitto, Antonio', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);