function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Agatha, Sabine', 1],
    ['Bankov, Nikola & Todorov, Milcho & Ganeva, Anna', 64],
    ['Da Costa, Emanuel Mendes', 5],
    ['Durán-Ramírez, Carlos Alberto & Dias, Roberto Júnio Pedroso', 2],
    ['Liu, Weiwei & Yi, Zhenzhen & Lin, Xiaofeng & Li, Jiqiu', 3],
    ['Song, Weibo', 2],
    ['Tsai, Sheng-Fang & Chen, Jun-Yu & Chiang, Kuo-Ping', 1],
    ['Tsai, Sheng-Fang & Chen, Wei-Ting & Chiang, Kuo-Ping', 1],
    ['Tsai, Sheng-Fang & Xu, Dapeng & Chung, Chih-Ching', 1],
    ['Wilbert, Norbert & Song, Weibo', 2],
    ['Xu, Dapeng & Song, Weibo & Sun, Ping & Chen, Xiangrui', 1],
    ['Xu, Dapeng & Song, Weibo & Warren, Alan', 2],
    ['Zhang, Wu-Chang & Feng, Mei-Ping & Yu, Ying & Chen, Xu-Miao', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=86)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);