function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biondi, Maurizio & D\'Alessandro, Paola', 1],
    ['Cho, H. - W. & An, S. L.', 6],
    ['Ekiz, Ali Nafiz & Şen, İsmail & Aslan, Ebru Gül & Gök, Ali', 1],
    ['Lee, Chi-Feng', 6],
    ['Petitpierre, Eduard & Sacarés, Antoni & Jurado-Rivera, José A.', 1],
    ['Prathapan, Kaniyarikkal D. & Poorani, Janakiraman', 2],
    ['Sergeev, M. E.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);