function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Filippova, Nina & Zvyagina, Elena & Rudykina, Elena', 5],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 3],
    ['Liu, Li-Na & Zhou, Guo-Ying & Tan, Zhu-Ming & Tian, Yong-Xiang', 2],
    ['Liu, Zewei & Ge, Yupeng & Zeng, Hui & Cheng, Xianhao & Na, Qin', 4],
    ['Liu, Zewei & Na, Qin & Cheng, Xianhao & Wu, Xiaoming', 2],
    ['Na, Qin & Bau, Tolgor', 4],
    ['Na, Qin & Liu, Zewei & Zeng, Hui & Ke, Binrong & Song, Zhizhong', 2],
    ['Soares, Célia C. B. & Cabral, Tiara S. & Vargas-Isla, Ruby', 1],
    ['Zambrano-Forero, Cristian J & Davila-Giraldo, Lina R', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    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);