function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alipanah, Helen & Slamka, František', 11],
    ['Garre, Manuel J. & Girdley, John & Guerrero, Juan J.', 4],
    ['Meyrick, Edward', 3],
    ['Shin, Bora & Choi, Sei-Woong & Kim, Sung-Soo', 2],
    ['Sinev, Sergey Yu. & Korb, Stanislav K.', 3],
    ['Tsvetkov, Eugene', 1],
    ['Weidlich, Michael', 1],
    ['[DUPLICATE RECORD!] Butler, Arthur G.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);