function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arens, Werner', 1],
    ['Dollfuss, Hermann', 37],
    ['Fox, Eduardo Gonçalves Paterson & Buys, Sandor Cristiano', 1],
    ['Gadallah, Neveen S.', 5],
    ['H, Phong & G, P. & N, Yuriy', 2],
    ['Jahantigh, Fatemeh & Rakhshani, Ehsan & Mokhtari, Azizollah', 1],
    ['Kohl,?', 1],
    ['Madl, M.', 2],
    ['Madl, Michael', 3],
    ['Mokrousov, Mikhail V. & Proshchalykin, Maxim Yu.', 2],
    ['Ohl, Michael', 1],
    ['Willsch, Maraike & Friedrich, Frank & Baum, Daniel', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=57)',
    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);