function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bojková, Jindřiška & Soldán, Tomáš & Cr, Biology Centre As', 1],
    ['Darilmaz, Mustafa Cemal & Salur, Ali & Murányi, Dávid', 6],
    ['Errochdi, Sanae & Alami, Majida El & Vinçon, Gilles', 1],
    ['Graf, Wolfram & Popijač, Aleksandar & Previšić, Ana', 1],
    ['Graf, Wolfram & Stradner, Dennis & Weiss, Steve', 1],
    ['Murányi, Dávid', 2],
    ['Vinçon, Gilles & Alami, Majida El & Errochdi, Sanae', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    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);