function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fabricius, Johann Christian', 8],
    ['Gadallah, Neveen S.', 5],
    ['Ghahari, H. & Havaskary, M. & Tabari, M. & Ostovan, H.', 2],
    ['Jahantigh, Fatemeh & Rakhshani, Ehsan & Mokhtari, Azizollah', 4],
    ['Madl, M.', 7],
    ['Menke, Arnold S.', 1],
    ['Mokrousov, M. V. & Proshchalykin, M. Yu. & Aliyev, Kh. A.', 1],
    ['Mokrousov, M. V. & Shorenko, K. I. & Shlyakhtenok, A. S.', 1],
    ['Smith, F.', 1],
    ['Smith, Frederick', 1],
    ['Walker, Francis', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=39)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);