function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bidzilya, Oleksiy & Karsholt, Ole & Kravchenko, Vasiliy', 3],
    ['Bidzilya, Oleksiy & Nupponen, Kari', 1],
    ['D, Nandhini & R, Shashank P. & Joshi, Rahul & Reddy, Karthik M.', 2],
    ['Huemer, Peter', 12],
    ['Huemer, Peter & Karsholt, Ole & Mutanen, Marko', 2],
    ['Junnilainen, Jari & Karsholt, Ole & Nupponen, Kari', 13],
    ['Karsholt, Ole & Huemer, Peter', 5],
    ['Landry, Bernard', 2],
    ['Šumpich, Jan & Huemer, Peter & Bidzilya, Oleksiy', 13]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=53)',
    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);