function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['DRABER-MOŃKO, Agnieszka', 9],
    ['El-Hawagry, Magdi S. & Abdel-Dayem, Mahmoud S.', 1],
    ['El-Hawagry, Magdi S. & Sharaf, Mostafa R. & Al Dhafer, Hathal M.', 1],
    ['Hou, Peng & Li, Xin & Yang, Ding & Zhang, Chuntian', 18],
    ['Khan, Qaiser & Kakar, Asmathullah & Kamran, Kashif', 1],
    ['Meigen, Johann Wilhelm', 1],
    ['Nihei, Silvio S.', 1],
    ['Schlüsslmayr, Gerhard', 6],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=44)',
    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);