function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brakenhoff., Von H.', 4],
    ['Cordero, Marco', 2],
    ['Ghaderi, Reza & Karegar, Akbar & Miraeiz, Esmaeil', 36],
    ['Khudhir, Manda & Hodda, Mike & Nicholas, Evelyn', 6],
    ['Menzel, Rich.', 3],
    ['Meyl, Arwed Hugo', 4],
    ['Shahina, F. & Nasira, K. & Firoza, K. & Erum, Y. I.', 6],
    ['Stefanski, W.', 4],
    ['Subbotin, Sergei A. & Chitambar, John J. & Chizhov, Vlamidir N.', 8],
    ['Thorne, Gerald', 8],
    ['Von W. Schneider', 8],
    ['Wilhelm Schneider', 8],
    ['Wouts, W. M.', 16],
    ['Zeng, Yongsan & Ye, Weimin & Tredway, Lane & Martin, Samuel', 8],
    ['Árpád, Soós', 38],
    ['Other (13)', 19]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=178)',
    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);