function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abdel-Dayem, Mahmoud S. & Fad, Hassan H. & El-Torkey, Ashraf M.', 2],
    ['Barševskis, Arvīds & Janovska, Marina & Aksjuta, Kristīna', 1],
    ['Blackburn, T. & Sharp, David', 1],
    ['Blair, K. G.', 1],
    ['Kejval, Zbyněk & Chandler, Donald S.', 2],
    ['LeConte, John L.', 1],
    ['Mitter, Heinz', 1],
    ['Motschulsky, Victor de', 2],
    ['Nardi, Gianluca', 2],
    ['Paykull, G. von', 1],
    ['Sakai, Masahiro & Ohbayashi, Nobuo Dr.', 1],
    ['Telnov, Dmitry', 3],
    ['Telnov, Dmitry & Ghahari, Hassan', 28],
    ['Webster, Reginald P. & Sweeney, Jon D. & DeMerchant, Ian', 3],
    ['Werner, Floyd G. & Chandler, Donald S.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=51)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);