function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Davranoglou, Leonidas-Romanos & Matsumoto, Keita & Soh, Zestin', 1],
    ['Di Russo, Claudio & Allegrucci, Giuliana & Rampini, Mauro', 1],
    ['Di Russo, Claudio & Rampini, Mauro & Chimenti, Claudio', 1],
    ['Rampini, Mauro & Russo, Claudio Di & Pavesi, Francesca', 5],
    ['Rampini, Mauro & Russo, Claudio Di & Taylan, Mehmet Sait', 4],
    ['Russo, Claudio Di & Alexiou, Sotiris & Rampini, Mauro', 1],
    ['Russo, Claudio Di & Rampini, Mauro & Chimenti, Claudio', 3],
    ['Skejo, Josip & Rebrina, Fran & Szövényi, Gergely', 2],
    ['Taylan, Mehmet S. & Russo, Claudio Di & Rampini, Mauro', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);