function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bonato, Lucio & Minelli, Alessandro', 1],
    ['Calvanese, Victor C. & Brescovit, Antonio D.', 5],
    ['Chagas-Jr, Amazonas & Bichuette, Maria Elina', 1],
    ['Cupul-Magaña, Fabio Germán', 1],
    ['Hollier, John & Stagl, Verena', 3],
    ['Jonishi, Taro & Nakano, Takafumi', 1],
    ['Perez-Gelabert, Daniel E.', 1],
    ['Thofern, Detlef & Dupérré, Nadine & Harms, Danilo', 2],
    ['Tran, Binh T. T. & Le, Son X. & Nguyen, Anh D.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    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);