function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Guil, Noemí', 20],
    ['Gąsiorek, Piotr & Stec, Daniel & Morek, Witold', 6],
    ['Kaczmarek, Łukasz', 66],
    ['Kaczmarek, Łukasz & Michalczyk, Łukasz & Mcinnes, Sandra J.', 69],
    ['Li, Xiao-Chen & Wang, Da-Yong & Wang, Li-Zhi', 6],
    ['Li, Xiaochen', 18],
    ['Lisi, Oscar', 7],
    ['Moreno, Antonio & Roszkowska, Milena & García, Mario Alberto', 8],
    ['Pilato, Giovanni & Kiosya, Yevgen & Lisi, Oscar', 26],
    ['Pilato, Giovanni & Lisi, Oscar', 6],
    ['Pilato, Giovanni & Lisi, Oscar & Binda, Maria Grazia', 11],
    ['Rossi, Gustavo & Claps, Maria & Ardohain, Diego', 7],
    ['Tumanov, Denis V.', 11],
    ['Wang, Lizhi', 10],
    ['Zawierucha, Krzysztof & Dziamiecki, Jakub & Jakubowska, Natalia', 11],
    ['Other (60)', 117]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=399)',
    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);