function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dworschak, Peter C.', 12],
    ['Dworschak, Peter C. & Poore, Gary C. B.', 9],
    ['Felder, Darryl L.', 5],
    ['Felder, Darryl L. & Robles, Rafael', 5],
    ['Hyžný, Matúš', 7],
    ['Hyžný, Matúš & Gašparič, Rok', 4],
    ['Hyžný, Matúš & Hudáčková, Natália', 4],
    ['Komai, Tomoyuki & Poore, Gary C. B. & Fujita, Yoshihisa', 8],
    ['Mantelatto, Fernando L. & Al, Et', 6],
    ['Marin, Ivan', 8],
    ['Naderloo, Reza & Türkay, Michael', 5],
    ['Ngoc-Ho, Nguyen', 20],
    ['Pachelle, Paulo P. G. & Anker, Arthur & Mendes, Cecili B.', 4],
    ['Pachelle, Paulo P. G. & Tavares, Marcos', 6],
    ['Wicksten, Mary K.', 5],
    ['Other (48)', 89]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=197)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);