function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arabyat, Sahar & Katbeh-Bader, Ahmad & Greathead, David', 1],
    ['Avalos-Hernandez, Omar & Kits, Joel & Trujano-Ortega, Marysol', 5],
    ['Dils, J. & Özbek, H.', 4],
    ['Greathead, D. J. & Evenhuis, N. L.', 1],
    ['Greathead, David J.', 1],
    ['Lamas, Carlos José Einicker & Evenhuis, Neal L.', 2],
    ['Schlüsslmayr, Gerhard', 1],
    ['Sinclair, Bradley J.', 1],
    ['Yang, Ding & Yao, Gang & Cui, Wei-nuo', 1],
    ['Yao, Gang & Yang, Ding', 3],
    ['Yao, Gang & Yang, Ding & Evenhuis, Neal L.', 10],
    ['Ávalos-Hernández, Omar', 26]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=56)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);