function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baturina, Maria A. & Kaygorodova, Irina A. & Loskutova, Olga A.', 1],
    ['Darabi-Darestani, Kaveh & Sari, Alireza & Sarafrazi, Alimorad', 1],
    ['Grosser, Clemens & Pešić, Vladimir & Gligorović, Bogić', 1],
    ['Madill, Jacqueline & Hovingh, Peter', 3],
    ['Sawyer, Roy T.', 1],
    ['Schenková, Jana & Sychra, Jan & Košel, Vladimír & Kubová, Nela', 1],
    ['Wirchansky, Beth A. & Shain, Daniel H.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    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);