function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Giłka, Wojciech', 8],
    ['Giłka, Wojciech & Dobosz, Roland', 1],
    ['Giłka, Wojciech & Gadawski, Piotr', 2],
    ['Giłka, Wojciech & Spies, Martin', 1],
    ['Puchalski, Mateusz & Giłka, Wojciech', 17],
    ['Puchalski, Mateusz & Paasivirta, Lauri & Giłka, Wojciech', 2],
    ['Tasdemir, Ayse & Akyildiz, Gurcay Kivanc', 1],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 1],
    ['Wang, Xinhua & Guo, Yuhong', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=45)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);