function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Giuliano, Davide', 2],
    ['Hollier, John', 1],
    ['Holuša, Jaroslav & Kočárek, Petr & Vlk, Robert & Marhoul, Pavel', 2],
    ['MACHÁýKOVÁ, Lenka & FIKÁýEK, Martin', 7],
    ['Monnerat C. & Thorens P. & Walter T. & Gonseth Y.', 4],
    ['Skejo, Josip & Rebrina, Fran & Szövényi, Gergely', 7],
    ['Taylan, Mehmet Sait & Mol, Abbas & Sevgili, Hasan & Şirin, Deniz', 1],
    ['Ünal, Mustafa', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);